This paper describes a laboratory model AM broadcast receiver which used nine alloy junction transistors and two compensating diodes. Six of the transistors were of the laboratory P-N-P type, designed for radio-frequency-amplifiers, and three of the transistors were of the conventional P-N-P type selected for Class B audio driver and output service. The use of Class B output permitted a total batt...
View full abstract»

Some essential properties of amplifiers for operation in the UHF television band are discussed with particular reference to stability, gain, and noise factor. Various types of tubes have been evaluated, including the Western Electric 416A and 417A; RCA pencil triode; General Electric 6AJ4 and 6AM4; Sylvania 6AN4, and other tubes of special construction.
View full abstract»

A disc-seal planar triode and its performance as a UHF amplifier are discussed. The description of mechanical features is followed by calculations of available power gain, and the measured gain is shown to be close to that computed by theory. The noise figure is calculated by conventional means, but the measured value is found to be higher. Reasons for the discrepancy are pointed out. The four pol...
View full abstract»

Summary form only given, as follows. Larger kinescopes and the advent of compatible color television have given increased importance to the problem of improving the transient response of television receivers. This paper is concerned with receiver design factors that make for improved electrical fidelity, although the interlocking nature of the transmitter and receiver requires some consideration o...
View full abstract»

The paper deals with a method for synchronous detection employing half-wave rectifiers, rather than product demodulators, for the decoding of NTSC color signals. Two basic circuits are presented illustrating the balanced and unbalanced envelope detector and using conventional diodes and triodes, respectively. The ultimate phase accuracy is found to be ?? 2 degrees for the unbalanced type, and bett...
View full abstract»

A beam deflection tube is described which appears to be capable of economically performing some of the decoder operations in an NTSC color television receiver. Several circuit applications are reviewed and experimental results obtained on a receiver used in NTSC field tests are presented.
View full abstract»

In the course of color television field tests, it has been found that receivers need about 50 db of sound attenuation in the i-f channel in order to prevent beat between the sound carrier and the color carrier components from appearing in the receiver. It was of some interest to determine whether this high requirement was justified in an ideal receiver or was only the result of defects in a practi...
View full abstract»

Summary form only given. The DC Quadricorrelator is a new form of automatic-phase-control circuit -which, when applied to color synchronization, gives better performance and appears easier to manufacture than circuits previously used. It provides automatic color synchronization without need for a manually-operated frequency or phase control. The circuit combines good noise immunity with rapid pull...
View full abstract»